Chris Brown, of Bills Digest, reports Buffalo Bills C Dan Koons will remain at the team's practice facility for extra work with offensive line coach Jim McNally even though minicamps have concluded. Koons, who signed June 11 as an undrafted free agent out of Louisville, was the only player — out of 127 — to be offered a contract after a tryout earlier in the month. "I plan on staying around even though the offseason camps are done," said Koons. "Coach McNally has been coaching the other guys, so I'm staying another six days to get two hours a day with the coach."